Magnetorheological fluid (MRF) is a âsmartâ fluid containing magnetic iron particles in a carrier liquid, which rapidly changes from a liquid to a semi-solid state (increasing viscosity and stiffness) when a magnetic field is applied, and returns to liquid when the field is removed
Messing around with a close-up routine for kids or drunk people.. could also use an object found on the spectator.. like say they have strong energy and use an earring or bobby pin or something.. you can make a yes/no spirit board with a pencil or any piece of crisp paper. less folds and wrinkles the better. Havenât tried a laminated card yet, like for my wallet..
